The term CAMPER FUEL can refer to a variety of different fuels used for camping. The crossword solutions for this term are KEROSENE (8 letters), STERNO (6 letters), and TENT (4 letters). KEROSENE is a flammable hydrocarbon liquid that is often used as a fuel for camping stoves, lanterns, and heaters. Sterno is a brand of canned cooking fuel that is made from denatured alcohol and is commonly used to heat food while camping. TENT fuel is a type of fuel specifically designed to be used in tents for heating and cooking.